Sofa



FIG. 1 is the front elevational view of sofa;

FIG. 2 is the rear elevational view thereof;

FIG. 3 is the right side view thereof;

FIG. 4 is the left side view thereof;

FIG. 5 is the top plan view thereof;

FIG. 6 is the bottom plan view thereof; and,

FIG. 7 is the perspective view thereof. 

CLAIM The ornamental design for sofa, as shown and described. 